I started playing guitar when I was 7, and picked up bass when I was 15. I bought it because someone needed a bassist for a punk band, and I'd always been fascinated by the bass because my mum was well into motown, disco, and funk
When I was 22 our drummer left so I took up drumming to try and continue in the same sort of musical direction with my singer/guitarist mate. Drumming always just came naturally. Obviously there's a things you have to teach yourself - disconnecting your feet from your hands (mentally) was the first big hurdle
Anyway, I realise now that I've always been a drummer. I walk in time, I hear rhythms in all background noise, I drum with my teeth, feet, fingers, and hands, almost constantly, all my life. I remember playing with chop sticks on pots and pans when I was about 5.